saefroch wrote:For me and my friends (since our parents are graduate-level scientists that worked as managers in high-tech industry), all we had to do was give them a detailed rundown on pressure ratings, expected operation, and wear/degradation. Then a demonstration with a crude remote firing rig to prove it's safe.

Eye protection helps a lot. That's where most people get injured, the eyes are very fragile.

lol i just make what ever i want my mum and dad don't give a sh!t so long as i dont break anything like the fence and windows.

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'' To alcohol... The cause of, and solution to, all of life's problems.”
--Homer Simpson

Haha finally, got it working (thanks PS). We had to invent something for a class I got assigned to in my school. Believe it or not this was not the most expensive project in the class Now its time to rip it apart and use those nice pneumatics for something even cooler